ftrace: add tracing_thresh to function profile

This patch extends tracing_thresh functionality to function profile tracer.
If tracing_thresh is set, print those entries only,
whose average is > tracing thresh.

Link: http://lkml.kernel.org/r/1434972488-8571-1-git-send-email-umesh.t@samsung.com

Signed-off-by: Umesh Tiwari <umesh.t@samsung.com>
[ Removed unnecessary 'moved' comment ]
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 7 insertions, 2 deletions

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 02bece4a99ea..f46dbb5cdf76 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -613,13 +613,18 @@ static int function_stat_show(struct seq_file *m, void *v)
                 goto out;
         }
 
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+        avg = rec->time;
+        do_div(avg, rec->counter);
+        if (tracing_thresh && (avg < tracing_thresh))
+                goto out;
+#endif
+
         kallsyms_lookup(rec->ip, NULL, NULL, NULL, str);
         seq_printf(m, "  %-30.30s  %10lu", str, rec->counter);
 
 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
         seq_puts(m, "    ");
-        avg = rec->time;
-        do_div(avg, rec->counter);
 
         /* Sample standard deviation (s^2) */
         if (rec->counter <= 1)